The Mahle piston set for a 565ci small-block Ford is specified with a 4.600" bore, 4.250" stroke, 6.385" rod and 28.0cc chamber to yield a 15.5:1 compression ratio. The product details include a 2618 alloy reference and a total piston mass listing, intended for high-displacement builds that require those exact bore and compression specifications.
Mahle Piston Set SBF 565cid 4.600in Bore 4.250in Stroke 6.385in Rod .990in Pin 28cc 15.5 CR